I sometimes get these http errors, they usually clear, maybe after another task ready to report.
Edit: Cleared after another task ended and ready to report.

Below from message log. Copies of sched_request and sched_reply available if reqd.
Sched_request was 38913 bytes as in request.

5945 World Community Grid 29/09/2015 15:51:40 Sending scheduler request: To fetch work.
5946 World Community Grid 29/09/2015 15:51:40 Reporting 1 completed tasks
5947 World Community Grid 29/09/2015 15:51:40 Requesting new tasks for CPU
5948 World Community Grid 29/09/2015 15:51:40 [http] HTTP_OP::init_post(): https://scheduler.worldcommunitygrid.org/boinc/wcg_cgi/fcgi
5949 World Community Grid 29/09/2015 15:51:40 [http] HTTP_OP::libcurl_exec(): ca-bundle set
5950 World Community Grid 29/09/2015 15:51:40 [http] [ID#1] Info: About to connect() to scheduler.worldcommunitygrid.org port 443 (#1)
5951 World Community Grid 29/09/2015 15:51:40 [http] [ID#1] Info: Trying 198.20.8.246...
5952 World Community Grid 29/09/2015 15:51:41 [http] [ID#1] Info: Connected to scheduler.worldcommunitygrid.org (198.20.8.246) port 443 (#1)
5953 World Community Grid 29/09/2015 15:51:41 [http] [ID#1] Info: Connected to scheduler.worldcommunitygrid.org (198.20.8.246) port 443 (#1)
5954 World Community Grid 29/09/2015 15:51:41 [http] [ID#1] Info: successfully set certificate verify locations:
5955 World Community Grid 29/09/2015 15:51:41 [http] [ID#1] Info: CAfile: C:\Program Files\BOINC\ca-bundle.crt
5956 World Community Grid 29/09/2015 15:51:41 [http] [ID#1] Info: CApath: none
5957 World Community Grid 29/09/2015 15:51:41 [http] [ID#1] Info: SSLv3, TLS handshake, Client hello (1):
5958 World Community Grid 29/09/2015 15:51:41 [http] [ID#1] Info: SSLv3, TLS handshake, Server hello (2):
5959 World Community Grid 29/09/2015 15:51:41 [http] [ID#1] Info: SSLv3, TLS handshake, CERT (11):
5960 World Community Grid 29/09/2015 15:51:41 [http] [ID#1] Info: SSLv3, TLS handshake, Server finished (14):
5961 World Community Grid 29/09/2015 15:51:41 [http] [ID#1] Info: SSLv3, TLS handshake, Client key exchange (16):
5962 World Community Grid 29/09/2015 15:51:41 [http] [ID#1] Info: SSLv3, TLS change cipher, Client hello (1):
5963 World Community Grid 29/09/2015 15:51:41 [http] [ID#1] Info: SSLv3, TLS handshake, Finished (20):
5964 World Community Grid 29/09/2015 15:51:41 [http] [ID#1] Info: SSLv3, TLS change cipher, Client hello (1):
5965 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Info: SSLv3, TLS handshake, Finished (20):
5966 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Info: SSL connection using DES-CBC3-SHA
5967 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Info: Server certificate:
5968 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Info: subject: C=US; ST=New York; L=Armonk; O=International Business Machines Corporation; CN=*.worldcommunitygrid.org
5969 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Info: start date: 2015-06-23 00:00:00 GMT
5970 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Info: expire date: 2017-08-21 23:59:59 GMT
5971 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Info: subjectAltName: scheduler.worldcommunitygrid.org matched
5972 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Info: issuer: C=US; O=thawte, Inc.; CN=thawte SSL CA - G2
5973 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Info: SSL certificate verify ok.
5974 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Sent header to server: POST /boinc/wcg_cgi/fcgi HTTP/1.1
5975 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Sent header to server: User-Agent: BOINC client (windows_intelx86 7.2.47)
5976 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Sent header to server: Host: scheduler.worldcommunitygrid.org
5977 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Sent header to server: Accept: */*
5978 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Sent header to server: Accept-Encoding: deflate, gzip
5979 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Sent header to server: Content-Type: application/x-www-form-urlencoded
5980 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Sent header to server: ACCEPT_LANGUAGE: en_GB
5981 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Sent header to server: Content-Length: 38913
5982 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Sent header to server: Expect: 100-continue
5983 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Sent header to server:
5984 World Community Grid 29/09/2015 15:51:42 [http] [ID#1] Received header from server: HTTP/1.1 100 Continue
5985 World Community Grid 29/09/2015 15:51:43 [http] [ID#1] Received header from server: HTTP/1.1 200 OK
5986 World Community Grid 29/09/2015 15:51:43 [http] [ID#1] Received header from server: Date: Tue, 29 Sep 2015 14:50:57 GMT
5987 World Community Grid 29/09/2015 15:51:43 [http] [ID#1] Received header from server: Server: IBM_HTTP_Server
5988 World Community Grid 29/09/2015 15:51:43 [http] [ID#1] Received header from server: Vary: Accept-Encoding
5989 World Community Grid 29/09/2015 15:51:43 [http] [ID#1] Received header from server: Content-Encoding: gzip
5990 World Community Grid 29/09/2015 15:51:43 [http] [ID#1] Received header from server: Content-Length: 3154
5991 World Community Grid 29/09/2015 15:51:43 [http] [ID#1] Received header from server: Content-Type: text/xml
5992 World Community Grid 29/09/2015 15:51:43 [http] [ID#1] Received header from server:
5993 World Community Grid 29/09/2015 15:51:43 [http] [ID#1] Info: Error while processing content unencoding: invalid stored block lengths
5994 World Community Grid 29/09/2015 15:51:43 [http] [ID#1] Info: Closing connection #1
5995 World Community Grid 29/09/2015 15:51:43 [http] [ID#1] Info: SSLv3, TLS alert, Client hello (1):
5996 World Community Grid 29/09/2015 15:51:43 [http] HTTP error: Unrecognized or bad HTTP Content or Transfer-Encoding
5997 World Community Grid 29/09/2015 15:51:44 Scheduler request failed: Unrecognized or bad HTTP Content or Transfer-Encoding
5998 29/09/2015 15:51:46 Project communication failed: attempting access to reference site
5999 29/09/2015 15:51:46 [http] HTTP_OP::init_get(): http://www.ibm.com/
6000 29/09/2015 15:51:46 [http] HTTP_OP::libcurl_exec(): ca-bundle set
6001 29/09/2015 15:51:46 [http] [ID#0] Info: Re-using existing connection! (#0) with host (nil)
6002 29/09/2015 15:51:46 [http] [ID#0] Info: Connected to (nil) (23.51.203.26) port 80 (#0)
6003 29/09/2015 15:51:46 [http] [ID#0] Sent header to server: GET / HTTP/1.1
6004 29/09/2015 15:51:46 [http] [ID#0] Sent header to server: User-Agent: BOINC client (windows_intelx86 7.2.47)
6005 29/09/2015 15:51:46 [http] [ID#0] Sent header to server: Host: www.ibm.com
6006 29/09/2015 15:51:46 [http] [ID#0] Sent header to server: Accept: */*
6007 29/09/2015 15:51:46 [http] [ID#0] Sent header to server: Accept-Encoding: deflate, gzip
6008 29/09/2015 15:51:46 [http] [ID#0] Sent header to server: Content-Type: application/x-www-form-urlencoded
6009 29/09/2015 15:51:46 [http] [ID#0] Sent header to server: ACCEPT_LANGUAGE: en_GB
6010 29/09/2015 15:51:46 [http] [ID#0] Sent header to server:
6011 29/09/2015 15:51:47 [http] [ID#0] Received header from server: HTTP/1.1 302 Moved Temporarily
6012 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Server: AkamaiGHost
6013 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Content-Length: 0
6014 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Location: http://www.ibm.com/uk/en/
6015 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Date: Tue, 29 Sep 2015 14:51:02 GMT
6016 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Connection: keep-alive
6017 29/09/2015 15:51:47 [http] [ID#0] Received header from server:
6018 29/09/2015 15:51:47 [http] [ID#0] Info: Connection #0 to host (nil) left intact
6019 29/09/2015 15:51:47 [http] [ID#0] Info: Issue another request to this URL: 'http://www.ibm.com/uk/en/'
6020 29/09/2015 15:51:47 [http] [ID#0] Info: Re-using existing connection! (#0) with host (nil)
6021 29/09/2015 15:51:47 [http] [ID#0] Info: Connected to (nil) (23.51.203.26) port 80 (#0)
6022 29/09/2015 15:51:47 [http] [ID#0] Sent header to server: GET /uk/en/ HTTP/1.1
6023 29/09/2015 15:51:47 [http] [ID#0] Sent header to server: User-Agent: BOINC client (windows_intelx86 7.2.47)
6024 29/09/2015 15:51:47 [http] [ID#0] Sent header to server: Host: www.ibm.com
6025 29/09/2015 15:51:47 [http] [ID#0] Sent header to server: Accept: */*
6026 29/09/2015 15:51:47 [http] [ID#0] Sent header to server: Accept-Encoding: deflate, gzip
6027 29/09/2015 15:51:47 [http] [ID#0] Sent header to server: Referer: http://www.ibm.com/
6028 29/09/2015 15:51:47 [http] [ID#0] Sent header to server: Content-Type: application/x-www-form-urlencoded
6029 29/09/2015 15:51:47 [http] [ID#0] Sent header to server: ACCEPT_LANGUAGE: en_GB
6030 29/09/2015 15:51:47 [http] [ID#0] Sent header to server:
6031 29/09/2015 15:51:47 [http] [ID#0] Received header from server: HTTP/1.1 200 OK
6032 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Cache-Control: max-age=301
6033 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Expires: Tue, 29 Sep 2015 14:29:07 GMT
6034 29/09/2015 15:51:47 [http] [ID#0] Received header from server: ntCoent-Length: 11957
6035 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Cache-Control: no-cache
6036 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Kp-eeAlive: timeout=10, max=4
6037 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Content-Type: text/html;charset=UTF-8
6038 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Content-Language: en-US
6039 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Content-Encoding: gzip
6040 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Content-Length: 3638
6041 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Date: Tue, 29 Sep 2015 14:51:03 GMT
6042 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Connection: keep-alive
6043 29/09/2015 15:51:47 [http] [ID#0] Received header from server: Vary: Accept-Encoding
6044 29/09/2015 15:51:47 [http] [ID#0] Received header from server:
6045 29/09/2015 15:51:47 [http] [ID#0] Info: Connection #0 to host (nil) left intact
6046 29/09/2015 15:51:48 Internet access OK - project servers may be temporarily down.

Paul.